<1% per hour. This is achieved by:
1. use consumption patterns to know when to transmit data (eg, if no one is actively tracking, no need to transmit data on radio) [1]
2. using accelerometer and gyroscope data to know when to collect data (eg, if you're not moving, no need to use GPS)
Ah, old post actually, dated Nov 2016. Just wanted to share it for the variable freq approach - sorry for the confusion! We released a major update of the SDK this March which brought in significant improvements due to sensor data.
[1] We blogged about how we built out our variable frequency model: https://blog.hypertrack.com/2016/11/28/battery-efficient-rea...